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Finding the Fourth Proportional to 187.99, 258.59 and 165.44

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Solution

The fourth proportional to 187.99, 258.59 and 165.44 is: 227.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.99 : 258.59 = 165.44 : x
  2. Step 2: Convert to fraction form
    187.99/258.59 = 165.44/x
  3. Step 3: Cross multiply
    187.99x = 258.59 × 165.44
  4. Step 4: Simplify right side
    187.99x = 42,782.19
  5. Step 5: Solve for x
    x = 42,782.19/187.99
  6. Step 6: Final answer
    x = 227.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.